Explanation:
Given that,
Wavelength of light, 
Angle, 
We need to find the slit spacing for diffraction. For a diffraction, the first order principal maximum is given by :

n is 1 here
d is slit spacing

So, the slit spacing is
.
Explanation:
the object has constant velocity for 2 seconds and it get a constant accelration (2ms-2)
Answer:
air resistance, gravitational force
I mean if he flies 5g that means that's his average speed too